The Dinan Valved Axle-Back Exhaust is fabricated from 100% brushed, TIG-welded T304 stainless steel and installs at the factory cut points and mounts for OE-precise fitment. It replaces the stock dual slash-cut 90mm (3.5in) tips with massive straight-cut 102mm (4in) double-walled, black ceramic-coated, laser-engraved tips for an unmistakable rear look and a deep growl atypical of the base 4-cylinder turbo platform. Factory valve control is retained, and Dinan's drone-abatement design keeps the cabin composed. The system adds up to +4 HP and +3 lb-ft and installs bolt-on with the included mounting hardware.
Specifications
| Type | Valved axle-back exhaust |
| Material | T304 stainless steel, TIG welded, brushed |
| Tips | Dual 4in (102mm) straight-cut, double-walled, laser-engraved |
| Finish | Black ceramic-coated tips |
| Valves | Retains factory valve control |
| Power Gain | +4 HP & +3 lb-ft |
| Part Number | D660-0091-BLK |
Documents: Installation Instructions (PDF)
This part fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2019-2024 | BMW | 330i | Base |
| 2019-2024 | BMW | 330i xDrive | Base |
| 2021-2024 | BMW | 430i | Base |
| 2021-2024 | BMW | 430i xDrive | Base |
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